Ventilating apparatus



Dec. 18; 1928. 1,695,784

1. a STERNBERG VENTILATING APPARATUS Filed llay 27, 1927 2 SheetseSheet l Dec.18,19 28. 7 1395.184

I a. c. STERNBERG VENTILATING APPARATUS Filed llay 27, 1927 2 Sheets-Shut 2 jzuc /zZbr Patented Dec. 18, l928.

UNITED STATES srnnnnnno, OF NEW YORK, N.

IRVING C. TION, OF CHICAGO, ILLINOIS,

Y., ASSIGNOR TO nno'rro NIT-AIR conrom A conronarron or ILLINOIS.

vnn'rrtn'rmo APPARATUS.

Application filed May 27,

This invention relates to improvements in ventlla-tmg apparatus and it consists of the matters hereinafter described and more particularly pointed out in the appended claims.

The primary object of the invention is to provide a ventilating apparatus especially adapted for use in theatres, restaurants and other places of public gathering, wherein a plurality of different ventilating actions may be had with one and the same apparatus, as for instance when fresh outside air is desired, or the exhaustion of inside air or even the recirculation of the same.

Another object of the invention is to provide a duplex mouth arrangement for the apparatus which opens one into the space to be ventilated and the other to the outside at mosphere respectively,.the re being a novel damper arrangement therein whereby either mouth opening may be. readily connected to the inlet or outlet of the fan'casing included in the apparatus. v

These objects of the invention as well as others, together with the many advantages thereof, will more fully appear as I proceed with my specification.

In the drawings: 7

Fig. 1 is .a horizontal plan sectional view through a typical blower room of atheatre in which is embodied the preferred form ofmy invention. Y

Fig. 2 is a similar view with certain parts in a changed relation. 7

Fig. 3 is'a vertical sectional View as taken on the line 33 of Fig. 1.

Fig. 4 is a perspective View of the duplex mouth as it appears when removed from the blower or fan casing. The invention is herein illustrated and will "bedescribed as embodied in the ventilating apparatus of a theatre but this is to be considered as by way of illustration only'and not by way of limitation because the invention is also applicable for other uses where its peculiar characteristics make it of advantage to 'do so.

Referring now in detail to that embodiment of the invention illustrated in the accompanying drawings, 1 indicates one of the side walls of a theatre building, 2 indicates the rear wall thereof, 3 indicates a'wall at the front of the stage/1, and'5 indicates a wall parallel with the side wall and connecting the rear and stagewalls. The various walls define a. normally closed compartment 6,

1927. Serial No. 194,620. 1

which is commonly termed a blower room, at one side of the stage in which the ventilating apparatus is located, a'ccess being had to said room from the stage through a door and doorway 7 In the stage wall 3 is provided a rectangular opening 8 connecting the blower room 6 and the auditorium 9 of the theatre and in said opening are provided the usual deflector blades 8*. In the wall 1 near the stagewall is a second rectangular opening 10 connecting said blower room with the outside atmosphere, there being a plurality of louver like movable dampers 10 therein to open or close the same. In the stage wall 3 above the opening 8, I provide a second opening 8 in which is a louver damper arrangement 8 that may be manipulated from within the blower room to open or close oil said opening.

. In the blower room 6 and suitably arranged on the floor thereof is a blower or fan casing 11 of a well known kind which includes a bottom discharge neck 12 of a rectangular cross section. This casing has the usual air inlets at its sides and the fan thereof is provided with a pulley 13 at one side of the casing driven by a belt 1 1 from an electric motor 15. The fan casing in this instance is set or arranged at an angle to the plane of any of the walls defining said room and in this instance the longitudinal median plane of the casing as indicated by the dotted line I 16 passes through the stage wall at a point midway between the opening 8 and the wall 1. The discharge neck 12 of the fan casing 11 connected to both openings 8 and 10 respectively by what I term a duplex discharge mouth casing indicated as a whole at 17 and best shown in perspective in Fig. 4. This casing which is substantially V-shaped in plan is tubular and includes two legs or portions 18 and 19 respectively, which diverge from a common open rear end 20 of a cross sectional area approximating that of the neck 12 of the fan casing arid of substantially the same cross sectional area as either leg 18 or 19. The rear end of-the casing is connected in any suitable manner to the neck 12 of the fan casing 11 and asherein shown is directly connected "thereto while the discharge legs or portions 18 and 19 respectively are eachconneeted to the walls 3 and 1 about the-associated openings 8 and 10 therein by an angle bar 21. Each leg 18 and 19 is open at the far sides as at 22 and 23 respectively, as shown inFigs. 1 and 2 while the adjacent side walls are closed to form a junction or crotch 24 disposed in the median plane of the fan casmouth casing by which One of said legs 18 or 19 may be continued or connected to the discharge neck 12 and wherein the other neck will be opened or connected to the interior of the blower room and consequently to the inlet openings of the fan casing 11. l find one convenient form of such means to be embodied in a pair of vertically edgewise disposed platelike dampers and 26 respectively each fixed to a vertical axis pin 27 and 28 respectively arranged at the rear end of the duplex mouth casing adjacent the fan casing neck 12. Each damper plate is a length approximating the distance as represented by a straight line between the axis pins 27 and 28 and the crotch 24 and this'length is suflicient to close ofi an associated opening 2223 in said sides or walls of the,duplex mouth casing. On the top end of each axis pin 27 and 28 above the top wall of the casing neck 12 is an arm 2728 which arms are connected together by a link 29, the arm 27 having a handle 27 by which it may be actuated. On the top wall casing neck 12 are provided coacting stops 30 to engage the arm 27 a and thus hold it in either limit of its movement. I

Assume that the blower room door 7 is closed and that it is desired to blow fresh outside air into "the auditorium. The operation will be as follows. With the louver damper 8 arranged to close the opening 8*, the handle 27 would be grasped and the arm 27 swung to bring the dampers 25 and 27 into the position shown in Fig. 1 wherein the damper 25 is in a position closing the opening 22 and with the free end of the damper 26 engaged with the crotch 24 so as to expose the opening 23. With the louver damper 10 in the opening 10,- in a position to permit air to pass therethrough, said air will pass into the room and then into the inlet openings of the fan casing. From the fan casing the air is "discharged out through the neck 12 into the duplex discharge mouth to be directed by the dampers to the mouth 18 and out through the opening 8 in the stage wall into. the auditorium.

Assume that it is desired to exhaust the air from the auditorium. The dampers 27-26 would be moved into the positionshown in Fig. 2 and with the fan running, air would be drawn from the auditorium in through the opening 8 to pass through the exposed opening 22 into the fan room. From there it is drawn into the fan casing and discharged out through the neck to be directed by the dampers 25- 26 into the leg 19 and out through the opening 10 to atmosphere.

In many cases, when the outside air'is extremelycold and the air in the auditorium needs only a recirculation or to be kept in motion, this is brought about as follows. The louver damper-8 would be opened and the louver damper 10 in the opening 10' would be closed and the dampers 25--26 would be arranged as in Fig. 1, wherein the leg 18 is connected with the neck 12. With the fan running, air will be drawn into the fan room through the opening 8' and then pass into the fan casing and then out through the neck 12 to be directed by the dampers 2526 to the leg 18 and out through the wall opening 8 ;-.gipto the auditorium again. Thus the air "in the auditorium is recirculated and reconditioned.

As will be apparent, by my improved structure, I am enabled with one apparatus to provide for either blowing fresh air into the auditorium, exhausting air therefrom or for recirculating the air therein, just as may be desired. My improved apparatus is simple in construction and efi'ective in operation for its intended purpose.

I While in describing my invention, l have referred in detail to the form and arrangement of the various-parts thereof, the same must be considered as illustrative only, .so' that I do not wish to be limited thereto ex-. cept as may be pointed out in the appended claims.

ll claim as my invention:

1. In combination with building walls de-. 1

. into the influence of the inlet of said blower.

2. In combination with building walls defining a compartment and having apertures therein, one leading to atmosphere and another leadingto a room in said building to be ventilated, there being a third, aperture in one of said walls connecting said compartment and room, independently actuated means in said first and third mentioned apertures for controlling the passage of air therethrough, a blower in said compartment having an inlet and a discharge and ineanscapable of connecting said discharge to either saidfirs't or second mentioned apertures, said means in said first mentioned apertureclosing the said aperture while the third men-f tioned aperture is opened, thus providing a said second and third apertures. I

3. In combination with a building wall defining a chamber and having apertures there-- recirculation of the air insaid room through in, one leading'to atmosphere and the other mamas charge, a casing open at one end and including separate legs, one leadin to each of said apertures, and means in sai casing for connecting either leg to said discharge and the other to said inlet.

4. In combination with a building wall de- 7 fining a'chamber and having apertures ,therein, one leading to atmosphere and the other leading to a room to be ventilated, a blower 1n said chamber having aninletand a discharge, a casing open atpne end and including separate legs, one leading to each of said apertures, each leg having anopening therein, means including a pair of pivoted dampers so arranged as to connect either leg to said discharge and at the same time to uning therein, a pair of dampers pivoted nearthe discharge of saidblower and capable of moving in unison to connect one leg to said discharge and to uncover the opening in the other leg.-

6. In combination with a building wall defining a chamber and having apertures therein, one leading to atmosphere and the other leading to a room to be ventilated, a blower in said chamber having; an inlet and a discharge, a casing open at oneen'd and including separate legs, one leading to each of said apertures, each leg having an opening therein, a pair of dampers pivoted near the discharge of said blower, means outside the easing for simultaneously moving said dampers to connect one leg to said discharge and to uncover the opening in the other le 7. In combination with a blower outlet neck, a casing operatively connected at one end to said neck and having a plurality of ,legs each open at its end and each having an aperture 1n one of its walls near the first mentioned end and meaiis in said casing capable 0 being operated to connect having aneither leg to said neck and at the same time to expose the aperture in said wall of the other leg. 4

8. A casin ope at one end and having open ended legs diverging-therefrom, said casing having an opening in each side wall near said first mentioned end, and a pair of coactingdampers pivoted at the first mentioned end of the casing and movable to connect either of said legs with said open end of the casing and to expose the opening in the side walLof the other leg.

e In testimony whereof, I have ereunto set my hand, this 16th day of May, 927.

I IRVING o. STERNBERG. I 

